Study on the Land Surface Temperature Inversion and Its Influencing Factor Response Characteristics of Ali Region,TAR
Land surface temperature is one of the important indexes for measuring the ecological environment.Ali is located in the northwestern part of the Qinghai-Tibet Plateau and is a climate change sensitive area.Study-ing the temporal and spatial distribution of land surface temperature and its associated influencing factors is of great importance for understanding the process of thermal environmental change and monitoring the basic ecolog-ical changes in this area.In this paper,the Land Surface Temperature(LST)data of TRIMS LST-TP products of Ali area from 2000 to 2020 was used to study the temporal and spatial evolution of land surface temperature of this area and its influencing factors using the normalized grading method,the trend method as well as the center of gravity migration method.Meanwhile,three land surface parameters,namely,DEM,NDVI,and grass cover,were employed to explore the effectiveness of LST influencing factors.Our results indicate that except for the de-crease of the area of the mid-temperature zone from 2000 to 2020,the area of the other temperature zones in Ali area increased,and the comparison of increasing area size is as follows:low-temperature zone<sub-low-temper-ature zone<high-temperature zone<sub-high-temperature zone.Moreover,the annual averaged temperature in-crease is found to be 0.06℃from 2000 to 2020 in this area with the interannual variation of LST of fluctuating de-cline-rapid increase-slow decline-small increase.Furthermore,the center of gravity shows a northeast-to-southwest migration trend for the low-temperature zone,sub-low-temperature zone,and medium-temperature zone from 2000 to 2020,while it shows a southwest-to-northeast migration trend for sub-high-temperature zone and high-temperature zone.Furthermore,regarding the influencing factors,DEM has a negative influence on LST,and NDVI and grass cover have a positive influence on LST.
land surface temperaturespace-time evolutionnormalized vegetation indexspatiotemporal distri-butionclimate changeAli region
NETL
NSTL
万方数据
